First and second U-shape waveguides joined to a metallized dielectric carrier by a U-shape sealing frame

Abstract

The present invention relates to a transition arrangement comprising a first surface-mountable waveguide part, a second surface-mountable waveguide part and a dielectric carrier material with a metalization provided on a first main side. Each of the first and second surface-mountable waveguide parts comprises a first wall, a second wall and a third wall, which second and third walls are arranged to contact a part of the metalization, where the first and second surface-mountable waveguide parts are arranged to be mounted on the dielectric carrier material in such a way that the first and second surface-mountable waveguide parts comprise ends which are positioned to face each other. The transition arrangement further comprises an electrically conducting sealing frame that is arranged to be mounted over and covering the ends, where the electrically conducting sealing frame has a first wall, a second wall and a third wall, where the second and third walls are arranged to contact a part of the metallization.

The invention claimed is: 
     
       1. A transition arrangement comprising:
 a first waveguide part, 
 a second waveguide part and 
 a dielectric carrier material with a metalization provided on a first main side, 
 the first waveguide part comprising a first wall, a second wall and a third wall, the second and third walls are arranged to contact a part of the metalization, the first, second and third walls together essentially forming a U-shape, 
 the second waveguide part comprising a first wall, a second wall and a third wall, the second and third walls are arranged to contact a part of the metalization, the first, second and third walls together essentially forming a U-shape, 
 the first and second waveguide parts are arranged to be mounted on the metalization in such a way that the first and second waveguide parts comprise respective ends that are positioned to face each other, and 
 an electrically conducting sealing frame that is arranged to be mounted over and covering the respective ends where the electrically conducting sealing frame has a first wall, a second wall and a third wall, where the second and third walls are arranged to contact the metalization, the first wall of the electrically conducting sealing frame being substantially parallel to the dielectric carrier material and essentially forming a U-shape with the second and third walls of the electrically conducting sealing frame. 
 
     
     
       2. The transition arrangement according to  claim 1 , wherein a junction slot is disposed between the respective ends, where the electrically conducting sealing frame is arranged to seal the junction slot, such as to enhance a signal that is transferred between the first and second waveguide parts. 
     
     
       3. The transition arrangement according to  claim 1 , wherein the first and second waveguide parts each have a respective longitudinally extending flange part comprised in each of the second walls and third walls, and the electrically conducting sealing frame has a respective longitudinally extending flange part, each flange part being comprised in each of the second wall and the third wall, each flange part being arranged to be parts of the respective second and third walls that contact corresponding parts of the metalization when the first and second waveguide parts and the electrically conducting sealing frame are mounted. 
     
     
       4. The transition arrangement according to  claim 3 , wherein the flange parts of the first and second waveguide parts do not extend to the respective ends of the first and second waveguide parts, such that a first distance between the respective ends of opposing flange parts of the second walls of the first and second waveguide parts and a second distance between the respective ends of opposing flange parts of the third walls of the first and second waveguide parts both exceed a length of each one of the flange parts of the electrically conducting sealing frame, such that the flange parts of the electrically conducting sealing frame may be fitted between the respective flange parts of the first and second waveguide parts. 
     
     
       5. The transition arrangement according to  claim 4 , wherein the first distance and the second distance are essentially equal, and that the lengths of the flange parts of the electrically conducting sealing frame are essentially equal. 
     
     
       6. The transition arrangement according to  claim 1 , wherein the electrically conducting sealing frame is attached to the first and second waveguide parts by means of solder or electrically conducting glue. 
     
     
       7. The transition arrangement according to  claim 1 , wherein the electrically conducting sealing frame is made in several layers of material including an outer layer being made of a polymer, a middle layer constituting a metalization layer, thereby making the electrically conducting sealing frame electrically conductive, and an inner layer comprising an electrically conducting attachment means in a form of a soft solder alloy or electrically conducting glue. 
     
     
       8. The transition arrangement according to  claim 1 , wherein a part of the first waveguide part that is arranged to be covered by the electrically conducting sealing frame, a first recess is formed therein, running perpendicular to a longitudinal extension of the first waveguide part, along the first, second and third walls thereof, where a corresponding second recess is formed on the second waveguide part, and where, corresponding to the first and second recesses, lines of an electrically conducting attachment means are dispensed on sides of the first, second and third walls of the electrically conducting sealing frame that are intended to face the first and second waveguide parts, such that the lines of the electrically conducting attachment means are fitted into the first and second recesses when the electrically conducting sealing frame is mounted. 
     
     
       9. The transition arrangement according to  claim 8 , wherein the lines of the electrically conducting attachment means are combined with indents in the electrically conducting sealing frame, the indents being intended to fit into the first and second recesses when the electrically conducting sealing frame is mounted. 
     
     
       10. The transition arrangement according to  claim 8 , wherein the lines of the electrically conducting attachment means is in the form of solder or electrically conducting glue. 
     
     
       11. The transition arrangement according to  claim 1 , wherein the first waveguide part, the second waveguide part and the electrically conducting sealing frame comprise at least one waveguide filter iris and at least one waveguide filter protruding part to constitute a waveguide filter when mounted together. 
     
     
       12. The transition arrangement according to  claim 11 , wherein the electrically conducting sealing frame comprises the at least one waveguide filter protruding part on a side of the first wall thereof, facing the dielectric carrier material when the electrically conducting sealing frame is mounted, and in that each of the first and second waveguide parts comprises the at least one waveguide filter iris, such that a cavity structure is formed and the electrically conducting sealing frame at least partly forms walls and roof of the cavity structure when the first and second waveguide parts and the electrically conducting sealing frame are mounted. 
     
     
       13. The transition arrangement according to  claim 12 , wherein when the first and second waveguide parts and the electrically conducting sealing frame are mounted, the at least one waveguide filter protruding part protrudes between the first waveguide part and the second waveguide part, and enters into the cavity structure. 
     
     
       14. The transition arrangement according to  claim 11 , wherein the electrically conducting sealing frame comprises the at least one waveguide filter iris, and in that each of the first and second waveguide parts comprises the at least one waveguide filter protruding part. 
     
     
       15. The transition arrangement according to  claim 11 , wherein the electrically conducting sealing frame and the first and second waveguide parts are combined such that the wavequide filter comprises at least two cavity structures, the wavequide filter thus having at least two poles.